I would go for ellipses
Those dots that come in the middle of a quotation to indicate something omitted are called an “ellipsis” (plural “ellipses”): “Tex told Sam to get the . . . cow out of the bunk house.” Here Tex’s language has been censored, but you are more likely to have a use for ellipses when quoting some source in a paper: “Ishmael remarks at the beginning of Moby Dick, ‘some years ago . . . I thought I would sail about a little’ —a very understated way to begin a novel of high adventure.”
Ellipses is a general term also known or spelled as: elipsis, elleipsis, eclipsis.
The dictionary entry mentions:
a set of dots (...) indicating an ellipsis
Wikipedia article also specifically mentions:
Bringhurst writes that a full space between each dot is "another Victorian eccentricity."
Eclipsis is probably a misspelling, but it has a very nice conotation of hiding, where ellipses is simply omission. Both terms are normally defined for a word or longer part of text and there is hardly mention of omitting parts of the word or individual letters.
Wiktionary entry for eclipsis has a meaning of
A line or dash used to show that text has been omitted
which seems to be the exact thing that you are after.
However some sources define ellipses as
A set of three dots, periods, or dashes in a row
Some list them as synonyms.
Given all of the above, I would say that eclipsis and ellipses are terms which are not as precise as you might like. Therefore, take you pick.
Keep in mind that ellipses is used much more often than eclipsis, so you will definitively have to establish the context and explain what you mean by it. However, you will probably have to do the same for ellipses because it would most likely be taken to mean … - a single glyph made from three dots.